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Stared Molecules for Reinforced Adsorption and Protection on Mild Steel in Acid Medium

Journal of Wuhan University of Technology(Materials Science) 2025年第2期40卷 568-581页

作者： CHEN Yufeng SHI Yueting WANG Xinchao LI Hongru GAO Fang ZHANG Shengtao College of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China College of Chemistry and Environmental Engineering Chongqing University of Arts and SciencesChongqing 400044China College of Pharmacy Heze UniversityHeze 274000China

New stared compounds including norfloxacin fragments were prepared via a multi-step route,which were employed as the target corrosion inhibitors(TCIs)for mild steel in 1 mol/L HCl *** comparisons,the linear compounds including a single norfloxacin part employed as the reference corrosion inhibitors(RCIs)were *** molecular structures of the stared compounds were *** material simulation calculations suggest the presence of large binding energies of the stared compounds on mild steel *** enhanced chemisorption of the stared compounds on mild steel surface was demonstrated,which could be resulted by the chemical complexion of the target stared molecules with iron *** reinforced adsorption of the target compounds on mild steel surface was investigated by atomic force microscopy(AFM)and scanning electron microscopy(SEM).The electrochemical analyses reveal the super protection of the TCIs for mild steel in HCl solution,and the anticorrosion efficiency reaches 96.45%(TCI1,0.050 mM)and 96.61%(TCI2,0.010 mM)at 298 K.

关键词： stared compounds adsorption mild steel molecular simulation

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Overview of progress of liquid metal applications in nanomateriais,flexible electronics and new energy

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International Journal of Smart and Nano Materials 2024年第4期15卷 743-766页

作者： Yihao Ma Shuting Liang Dabo Jiang Jianyang Chen Yuanze Tang Qingshan Lin College of Chemical and Environmental Engineering Chongqing University of Arts and SciencesChongqingPR China Chongqing Key Laboratory of Environmental Materials&Remediation Technologies Chongqing University of Arts and SciencesChongqingPR China

As a novel material,liquid metal has attracted the attention of scientists for its unique properties and wide potential *** this paper,the basic concepts,properties,and behaviors of liquid metals under different conditions are introduced,and the latest advances in their synthesis methods and application felds are *** development status of liquid metal in science and industry is also *** latest research progress of liquid metals is systematically reviewed,and the potential and application prospect of liquid metals in materials science,engineering,and electronic techology are *** research scope covers the wide application of liquid metals in nanotechnology,materials engineering,electronic technology,energy,and other fields,as well as the latest application cases of liquid metals in flexible electronic devices,sensors,catalysts,energy storage,and other *** the same time,the core disputes and problems to be solved in the field of liquid metals are *** the comments on liquid metals,we hope to provide reference and guidance for researchers and promote the further development in the field of liquid *** review would help stimulate more people's interest in liquid metals and encourage innovation and application development in this field.

关键词： Liquid metal nanomaterials flexible electronics new energy field

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Structural performance of flexible freeform panelssubjected to wind loads

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Frontiers of Structural and Civil engineering 2024年第6期18卷 851-869页

作者： Yong YOO Zaryab SHAHID Renzhe CHEN Maria KOLIOU Anastasia MULIANA Negar KALANTAR Zachry Department of Civil and Environmental Engineering Texas A&M UniversityCollege StationTX 77843USA J.Mike Walker'66 Department of Mechanical Engineering Texas A&M UniversityCollege StationTX 77843USA Architecture Division California College of the ArtsSan FranciscoCA 94107USA

An increased number of hurricanes and tornadoes have been recorded worldwide in the last decade,while research efforts to reduce wind-related damage to structures become *** architecture,which focuses on generating complex curved shapes including streamlined shapes,has recently gained *** study focuses on investigating the potential of kerf panels,which have unique flexibility depending on the cut patterns and densities,to generate complex shapes for facades and their performance under wind *** investigate the kerf panel's potential capacity against wind loads,static and dynamic analyses were conducted for two kerf panel types with different cut densities and pre-deformed *** was observed that although solid panels result in smaller displacement amplitudes,stresses,and strains in some cases,the kerf panels allow for global and local cell deformations resulting in stress reduction in various locations with the potential to reduce damage due to overstress in *** the predeformed kerf panels,it was observed that both the overall stress and strain responses in kerf cut arrangements were lower than those of the flat-shaped *** study shows the promise of the use of kerf panels in achieving both design flexibility and performance demands when exposed to service *** that this newly proposed architectural configuration(design paradigm)for facades could revolutionize structural engineering by pushing complex freeform shapes to a standard practice that intertwines aesthetic arguments,building performance requirements,and material design considerations has the potential for significant practical applications.

关键词： freeform structure kerfing method wind load analysis cladding component

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Effects of typical karst tourist town on the Lijiang River water: from heavy metals to N-nitrosamines

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Journal of Earth Science 2024年

作者： Yuanyu Shan Yuru Su Xinli Xing Bingquan Zhu Honghu Zeng Yuan Zhang Junyu Li Xiaoyu Yan Wenwen Chen Benjian Li College of Environmental Science and Engineering， Guilin University of Technology School of Environmental Studies， China University of Geosciences State Key Laboratory of Biogeology and Environmental Geology， China University of Geosciences College of arts， Guilin University of Technology College of arts and communication， China University of Geosciences 430070 China

N-nitrosamines are nitrogenous organic pollutants with high carcinogenicity to human. Heavy metal pollution in aquatic system is currently a major environmental problem. Tourism in typical karst areas may influence the environment through wastewater discharge. However， it remains unclear whether these activities would cause water pollution. To evaluate the impact of tourism activities in typical tourist towns， this study investigated the occurrence and sources of 18 N-nitrosamines， eight heavy metals （HMs）， and dissolved inorganic nitrogen （DIN） in the Lijiang River and its tributaries. Seven N-nitrosamines were detected as the dominant compounds in N-nitroso-N-ethylaniline （NEA， average of 24.8 ng/L） and N-nitroso-l-proline （NPRO， 20.4 ng/L）， while especially low concentrations of HMs （Mn， Cu， As， Ni， Cr， Co， Pb， and Cd） and DIN (NH4+-N， NO2--N， and NO3--N) were observed. The most important influencing factors were seasonal factors， followed by land-use type and mainstem and tributary factors. Principal component analysis revealed that in the city with developed tourism and relatively less heavy industry， aquaculture and agricultural wastewater were identified as the primary sources of N-nitrosamines. Meanwhile， domestic sewage and agricultural wastewater were found to be the main sources of HMs and DIN， respectively. The ecological risk assessments for all pollutants are relatively low （< 1）. Therefore， N-nitrosamines， HMs， and DIN pollution caused by tourist activities pose a negligible risk to the Lijiang River.

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Recent progress on understanding of micro-and electronicstructures to synergistically enable the activity and stability for oxygen reduction

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Nano Research 2025年第3期18卷 48-72页

作者： Yao Liu Ruisi Li Junjun Xia Chenyang Shu Jianhong Liu Shaoxin Yan Rong Jin Haifeng Chen Liumei Teng Yujun Si Chaozhong Guo Yuxin Zhang Quan Xu School of Materials Science and Engineering Chongqing University of Arts and SciencesChongqing 402160China College of Material Science and Engineering Chongqing UniversityChongqing 400044China College of Materials Science and Engineering Central South UniversityChangsha 410083China Moray House school of education and sport the university of EdinburghEdinburgh EH88AQUK College of Chemistry and Environmental Engineering Sichuan University of Science and EngineeringZigong 643000China State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China

Single-atom catalysts(SACs)are considered as the most promising nonprecious metal alternatives for oxygen reduction reactions(ORR)in proton exchange membrane fuel cells because of their high atomic utilization and excellent catalytic ***,the inadequate activity and long-term stability of SACs under operational conditions significantly hinder their practical ***,this paper focuses on understanding the micro-and electronic structures that synergistically enable the activity and stability of oxygen *** provides a comprehensive summary of the effects for improving the ORR catalytic activity and stability of SACs from a multilevel,multi-angle perspective,including macroscale adjustments to the overall catalyst structure,nanoscale optimization of the catalyst microstructure,and atomic-scale regulation of the active ***,it emphasizes the importance of advanced simulation,computational methods,and characterization techniques in understanding the catalytic and degradation mechanisms of SACs during the ORR *** review aims to provide a theoretical foundation for the synergistic catalytic mechanisms and long-term stable operation of catalytic sites in complex heterogeneous environments,thereby advancing research on low-cost,high-efficiency,and highly stable single-atom catalysts.

关键词： single-atom catalysts(SACs) oxygen reduction reactions(ORR) structural regulation

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Preparation and characterization of polyvinylidene fluoride/graphene composite membranes via the electrostatic spinning method 9

Preparation and characterization of polyvinylidene fluoride/...

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2023 9th International Conference on Applied Materials and Manufacturing Technology, ICAMMT 2023

作者： Ni, Haitao He, Jinfeng Yang, Heshan College of Chemistry and Environmental Engineering Chongqing University of Arts and Sciences Chongqing402160 China Chongqing Water Resources and Electric Engineering College Chongqing402160 China

The polyvinylidene fluoride/graphene composite membranes were prepared by electrostatic spinning under different conditions. Statistical analysis was conducted on the film-forming properties and liquid absorption rate. Scanning electron imaging technology observed the typical morphologies of the prepared membranes. The influences of process conditions, such as the graphene content, the applied voltage, the needle-collector distance, and the spinning flow rate on the typical morphology of the composites, were compared. It was found that the applied and the needle-collector distance significantly affected the thin film's film-forming properties. In contrast, the flow rate had a smaller effect on the film properties and morphology. Comprehensive comparison results suggested that the morphology and uniformity of the fibers in the prepared composite material were relatively better at the needle-collector distance of 13 cm with a graphene content of 0.5%, the applied voltage of 18 KV, and the spinning flow rate of 0.12 μL/min. © Published under licence by IOP Publishing Ltd.

关键词： Graphene

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Near-ultraviolet excitable pseudo-wollastonite α-CaSiO3: Eu2+ blue phosphor for white light-emitting diodes

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Optoelectronics and Advanced Materials, Rapid Communications 2023年第3-4期17卷 148-151页

作者： Ma, Mingxing Zhu, Dachuan Wang, Zhixin Han, Tao School of Materials and Chemical Engineering Zhongyuan University of Technology Zhengzhou450007 China College of Material Science and Engineering Sichuan University Chengdu610065 China College of Chemistry and Environmental Technology Chongqing University of Arts and Sciences Chongqing402160 China

Pseudo-wollastonite α-CaSiO3 doped with Eu2+ was obtained through one-step calcination of precursors prepared by chemical co-precipitation method. This phosphor emits a strong blue band peaking at 449 nm with full width at half maximum of about 35 nm under the excitation at 365 nm. The blue luminescence originates from the allowed f-d transition of Eu2+ ions on Ca2+ sites. The energy transfer of Eu2+ in pseudo-wollastonite α-CaSiO3:Eu2+ phosphor has been demonstrated to be a resonant type via a dipole-dipole mechanism. α-CaSiO3:Eu2+ phosphor shows higher thermally stable luminescence which was found to be better than commercially available Y3Al5O12:Ce3+ phosphor. © 2023, National Institute of Optoelectronics. All rights reserved.

关键词： Luminescence

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Zirconium-Loaded Chelating Resin and Its Fluoride Adsorption Properties in Aqueous Solutions 8th

Zirconium-Loaded Chelating Resin and Its Fluoride Adsorption...

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8th International Conference on Advances in Energy Resources and Environment engineering, ICAESEE 2022

作者： Chen, Quanzhou Lei, Xiaoling Shi, Hongyan Yang, Jun Fan, Jianping Ding, Ge He, Kejie ChongQing Academy of Science and Technology Chongqing401121 China Key Laboratory of Environmental Materials & Remediation Technologies of Chongqing College of Chemistry & Environmental Engineering Chongqing University of Arts and Sciences Chongqing402160 China

ISBN: (纸本)9783031425622

In this paper, a poly ligand exchanger, Zirconium-loaded chelating resin bearing the functional group of amine phosphonic acid was prepared for the removal of fluoride in aqueous solutions. The effects of contact time, pH and resin dosage were conducted at different conditions. Batch adsorption equilibrium experiments showed that the optimal conditions for the adsorption of fluorine by amine phosphonic acid chelate resin were pH 1 and adsorption contact time 150 min at room temperature 25 °C. The maximum adsorption capacity of zirconium-loaded resin for fluoride ion reached 99.8 mg/g. Thermodynamic studies show that Freundlich model was the best fitted model compared with Langmuir isotherm model for the removal of fluoride by zirconium-loaded resin. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Ligands

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Transition metal-free Csp^(3)-Csp^(3) bond-forming reactions of N-tosylaziridines and gem-diborylalkanes

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Green Synthesis and Catalysis 2024年第4期5卷 329-333页

作者： Pu-Zhang Zi Quan-Hong Zhao Zhan-Cai Ma Xiao-Lin Ren Xing-Bang Liu Yi-Wei Qiao Lin-Wen Wei Song Liu Yuan Huang Department of Medicinal Chemistry School of PharmacyXi’an Jiaotong UniversityXi’an 710061China Chongqing Key Laboratory of Environmental Materials and Remediation Technologies College of Chemistry and Environmental Engineering Chongqing University of Arts and SciencesChongqing 402160China

The incorporation of additional Csp^(3) atoms into candidate drugs may enhance their pharmacological ***,it remains challenging to construct desired Csp^(3)-Csp^(3) bonds efficiently and *** present article reports a novel Csp^(3)-Csp^(3) bond-forming reaction of 2-aryl/alkyl substituted aziridines with gem-diborylalkanes under tranisiton metal free conditions.A wide range ofγ-gem-diboronate esters substituted amines can be accessed in good yield and *** results demonstrated that various aziridines could react with gem-diborylalkanes in the presence of LiTMP as the base within 15 min at ambient temperature.

关键词： Csp^(3)-Csp^(3)bond formation Transition metal-free N-tosylaziridines gem-diborylalkanes Ring-opening reactions

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A Research Status of 3D Printing of Different Metal Forms

A Research Status of 3D Printing of Different Metal Forms

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作者： Liu, Jianxiu Li, Yi Fan, Jianglei Wu, Shen Li, Ying Wang, Jun School of Mechanical and Electrical Engineering Zhengzhou University of Light Industry Henan Zhengzhou China College of Environmental Arts and Engineering Henan Polytechnic Henan Zhengzhou China

3D printing of metal materials plays an important role in the ranks of 3D printing and is one of the core development directions of 3D printing in the future. According to the different forms of metal raw materials, it can be roughly divided into powder printing, solid-state printing and liquid printing. Printed with powder metal as raw materials include laser selective sintering technology (SLS), laser selective melting technology (SLM), 3D printing technology (3DP), etc. printed with solid metal as raw materials include arc fuse deposition molding(WAAM)and layered solid manufacturing(LOM), etc. according to the different forms of 3D printing raw materials, this paper explores the applicable printing processes of different raw materials, and discusses the processing methods, process characteristics and research status of each process. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： 3D printing

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